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TiO2纳米管/钯双层膜中的光诱导产氢与同时分离的温度依赖性

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发表于 2018-4-26 13:24:14 | 显示全部楼层 |阅读模式
Temperature dependence of photoinduced hydrogen production and simultaneous separation in TiO2 nanotubes/palladium bilayer membrane
TiO2纳米管/钯双层膜中的光诱导产氢与同时分离的温度依赖性
Journal of Vacuum Science & Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena 36, 04H101 (2018);

https://doi.org/10.1116/1.5029281

Junki Asai and Kei Nodaa)
Hide Affiliations
Department of Electronics and Electrical Engineering, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522 Japan
a)Electronic mail: nodakei@elec.keio.ac.jp

ABSTRACT
摘要
Temperature dependence of photoinduced hydrogen production and simultaneous separation was examined in a bilayer membrane comprised by an anodized TiO2 nanotube array (TNA) and a palladium layer. This membrane was fabricated by transferring a TNA embedded in a titanium sheet onto an electroless-plated palladium film. Sacrificial water splitting with methanol was photocatalytically performed under ultraviolet (UV) irradiation and only generated hydrogen gas was concurrently separated with the Pd layer. The H2production rate (rH2) with the membrane at various temperatures was evaluated by using a home-made characterization system. The measured rH2 showed larger values at higher temperature of the membrane and increased abruptly after several hours of UV irradiation. This inflection behavior appeared earlier at the higher temperature of the membrane, which can be related to the permeation and adsorption characteristics of hydrogen in the Pd layer.

        在由阳极氧化的TiO2纳米管阵列(TNA)和钯层组成的双层膜中检测了光致产氢和同时分离的温度依赖性。该膜通过将嵌入钛片中的TNA转移到化学镀钯膜上来制造的。使用甲醇的牺牲水分解在紫外线(UV)照射下的进行光催化,并且在只产生氢气的同时与所述钯层分离。通过使用自制的表征系统评估在不同温度下膜的H2-产率(rH2)。测得的rH2在膜的较高温度下显示出较大的数值,并在数小时的UV照射后突然增加。这种拐点行为在较高的膜层温度的下出现较早,这可能与Pd层中氢的渗透和吸附特性有关。

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